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Finding the Fourth Proportional to 455, 682.56 and 198.56

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Solution

The fourth proportional to 455, 682.56 and 198.56 is: 297.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    455 : 682.56 = 198.56 : x
  2. Step 2: Convert to fraction form
    455/682.56 = 198.56/x
  3. Step 3: Cross multiply
    455x = 682.56 × 198.56
  4. Step 4: Simplify right side
    455x = 135,529.11
  5. Step 5: Solve for x
    x = 135,529.11/455
  6. Step 6: Final answer
    x = 297.87

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